Costello Cut-out

Similar to an "Irish Exit", the Costello Cut-out involves leaving a party or social gathering without saying goodbye, but shuffling your feet on the way out.

Gary : Hey where did Johnny Boy go?
Mike : I don't know, he was just here laughing and having fun. Then he disappeared.

--30 minutes later--
Gary : I think he gave us the Costello Cut-out.
Mike : Yea, shuffled right out on us.